[1.7.x] Fixed #22338 -- Fixed a test dependent on dictionary key iteration order.

Backport of 69a4f383f6 from master
[1.7.x] Added Python 3.4 to classifiers in setup.py.

Backport of 47509e3c5d from master
[1.7.x] Corrected an import in a model form docs example.

cb5dd99bb4 from master.